Loom protector rod actuating mechanism



Feb.v 24, 1948. 'w. LANGUIRAND LOOM PROTECTOR ROD ACTUATING MECHANISM Filed June 6, 1947 2 Sheets-Sheet l IQTILITIQI INVENTOR.

Dill /1'4? Z @9191; rkawa ATTORNEYS- Feb. 24, 1948. w. LANGUIRAND LOOM PROTECTOR ROD ACTUATING MECHANISM Filed June 6, 1947 1 2 Sheets-Sheet 2 ,ZZZ 6? INVENTOR.

Zm Z MW Patented Feb. 24, 1948 LOOM PROTECTOR ROD ACTUATIN G MECHANISM William Languirand, New Bedford, Mass., as-

signor to Textile Research 00., a corporation of Massachusetts Application June 6, 1947, Serial No. 753,064

7 Claims. (Cl. 139-347) This invention relates to a loom and more particularly to a means for actuating the protector rod.

In modern high'speed looms picking of the shuttle begins before the lay reaches the mid portion of its rearward movement, the shutter enters the shuttle box on the other side of the loom after the lay has reached back center and has begun its forward movement and the shuttle is usually completely boxed shortly before the lay has reached the forward limit oi. its forward movement. The shuttle box in which the shuttle is boxed includes a front plate and a back box plate. One of these plate or walls is pivotally supported at the outer end and is usually called a binder as it provides friction for the shuttle as it enters the box. The binder is provided with a swell which is engaged bythe incoming shuttle and which causes the binder to rock rearwardly against the pressure of a binder spring and against the pressure. of the protector rod spring. The protector rod extends lengthwise of the loom and is usually mounted in a bearing adjacent eitherrof its ends and. also may have a center bearing. Thedagger. is carried by this protector rod, while .an armextends from the rod up into operative relation with the binder of the shuttle box, so that if the shuttle is not in position in the box, the dagger will not be raised and consequently the loom will bang off. In order to lower the dagger into position so that the loom will bang off if the shuttle does not enter the box a spring is provided. The pressure of the binder spring and the protector rod spring does not vary appreciably and as a result the shuttle must enter a relatively tight box since substantial pressure must be maintained on the protector rod to insure that the dagger on the protector rod will be maintained in protecting position until the shuttle has entered the shuttle box a distance suiiicient to operate the protector mechanism. Increase in loom speeds necessarily requires increase protector rod spring pressure; thus, in order to obtain adequate pressure; substantialincrease in pressure is applied to the binder as the speed of the loom increases. This pressure causes difliculties in operation since a large amount of power is necessary to pick the shuttle out of the shuttle box and to drive it completely home into the shuttle box on the other side of the loom.

Thus, it follows that a reduction in pressure applied to the binder at the time that the shuttle is 2 duction in speed of the shuttle as it enters the opposite shuttle box. A reduction in binder pressure both when the shuttle is being picked and when it is being checked results in less wear on the shuttle and on the entire picking mechanism including the lug straps and the check straps.

One of the objects of this invention is to provide an improved construction whereby spring pressure on the protector rod may be reduced and yet the protector rod will be caused to quickly follow its desired movement with respect to the box binder.

Another object of this invention is to provide a construction which more quickly follows the lay movements and shuttle movements than may be had by a coil spring arrangement.

Another object of this invention is to provide a release of pressure on the shuttle as it i picked from the box. 7

Another object of this invention is to apply pressure on the box binder as the shuttle is entering the box.

. Another object of this invention is to provide a control for the box binder which will be actuated by the movement of the lay about its rockshaft.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is an elevation of a fragmental portion of the loom to illustrate the device which I have provided on the protector rod; 1

Fig. 2 is a top plan view of the structure shown in Fig. 1;

Fig. 3 is a section on substantially line 33 of Fig, 1;

Fig. 4 is a section on substantially line 4-4 of Fig. 1; r

Fig. 5 is a section similar to Fig. 4, but illustrating the parts in a different position; 7

Fig. 6 is a perspective View of a fragmental portion of the protector rod with my device applied thereto.

In proceeding with this invention, instead of increasing the tension of the spring which is applied to the protector rod, I have provided a very light spring or no spring on the protector rod and have attached to the protector rod a vane, which is of very light weight, but of substantial surface area, so that as the lay swings back and forth about its rockshaft, the pressure of the air upon this vane will rock or assist to rock the protector rod about its axis and thus apply a controlling action on the binder of the shuttle box and also upon the dagger which causes the loom to bang oif. By this arrangement, a much quicker action is provided in response to the movement of the lay than when the rod is moved by a spring.

With reference to the drawings, In designates a part of the loom frame having a front girth H and rearwardly thereof a rockshaft 2 upon which the lay sworcl I3 is mounted,. l tde'sign'at'es generally the shuttle box at one end of the lay and Hi the picker stick with the picker H5 at the upper end thereof for driving the shuttle I! (see 7 Fig. 2) out of the shuttle box I l. The front Wall of this shuttle box is designated l8 and the back wall is designated I9 which is cutout-as at for reception of the binder 21 which is pivoted as at 22 and is provided with a swell 23 to engage this shuttle and apply friction thereto when the shuttle enters the box 14.

The protector rod 24 is mounted in bearings at either end of the lay and also sometimes in a bearingat the mid portion of the lay and is provided with -a rearwardiy' extending arm 25 (see Fig. sand also Fig. 4') upon which the bracket through the sleeve and engage the rod. Thisadjiist'r'nent may be either longitudinally of therod or circularly of the rod.

The crank shaft is designated '31, having a crank 3'8 thereon with a link 3!! connecting this crank pin 40 to the lay as at M so that each time the "crank turns over the lay willbe reciprocated about its lbckshaft I2. i The lay, as shown in Fig. 4, is at front center, that is, the point furthest forward at which it Will operate, while in Fig. 5 the lay is Shown as passed front center with the link 39 and crank 38 out of line inwhi'ch position the lay is being returned or moved rearwardly.

As the lay is moved in the direction of the arrow 45 (see Fig '4), the pressure of "the air upon the surface it of the vane 33 will move the vane tram the position shown in dotted lines in Fig.4 "to the position shown in full lines in Fig. 4 and thus will rock the protector rod 24 to swing the arm 25 "and the bracket so as to force the finger 28 into engagement with the binder and move the binder into a position so "that when the shuttle enters the box friction will be applied thereto. The position of the vane "is inclined to a vertical so that there is a tendency for such gravityas may be applied to the light vane, to swing it downwardly and thus when the lay reverses its movement and starts to travel in a direction opposite to that of the arrow 45, as

4 shown in Fig. 4, the vane 33 will be moved from the position shown in full lines in Fig. 4 to the position shown in full lines in Fig. 5 at the very initial change in movement of the lay and thus will rock the protector rod 24 so as to move the arm 25 downwardly and the bracket 26 with its finger :28 away from the binder 21 so as to release it and leave the shuttle in the box free to be driven out by the picker stick.

This wind vane will cause a much quicker movement of the protector rod than is possible b'y-the'use of springs no matter how heavy they may be and by the use of a light spring and this wind action upon a vane, a much quicker movement w'iltbe load and thus one which is more lughly'desirable when high speed operation of the loom is engaged in,

l-. A loom comprising a lay having a shuttle box at one end thereof, a movable box wall, a protector rod responsive to the movement of said wan to control the looln stop motion and 'means responsive to the air pressure upon 'it' due to movement of the lay tomove said rod-t0 control movement er'theboxwall. i r r '2. .A loom comprisin a lay having a shuttle box at one end thereof; a movable box wall, a rotector 'r'Od responsive "toith'e movement of Said Wall to control the lbdfil "stop motion and means responsive to the air pressure upon it due to movement of; the lay to move "said rod to .move the box walli-nward as the lay approac'hesfront center of thecrank shaft.

3. A loom' as in claim 1 wherein said means comprises a vane on said rod extending. in a plane substantially-radial of the axis about which sai'd'lay swings.

4. A loom as in claim 73 wherein said vane extends downwardly toward the axis about which said lay-swings.

'5'. A loom as in claim v1 wherein said means comprises a vane on said rod of light weight materialand of substantial area.

6. A loom as in claim -1 wherein said means comprises a vane on said rod of light weight material and of substantial area extending in a planesubstantially radial of the axisabout which said lay swings and is swung beyond a vertical plane rearwardly as front center is reached whereby the action of gravity tendsto return it to a vertical plane and release said box wall as frontce'nter of the lay is'reached.

7. A loom as in claim -1 wherein said means comprises a vane on said rod of light weight material and of substantial areaextending .in a plane substantially radial of theaxisabout which said lay swings and. is swung beyond a vertical plane rearwardly as front center .is reached whereby the action of gravity tends to return it to avertical plane .and release-saidbox wall as front center of the lay islreached an-dl-theaction of'the air on said vane upon initialreturn of the crank shaft assists such movement of the rod.

WILLIAM 'LANGUIRAND. 

